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UPDATED 1 Sept: The EI library in London is temporarily closed to the public, as a precautionary measure in light of the ongoing COVID-19 situation. The Knowledge Service will still be answering email queries via email , or via live chats during working hours (09:15-17:00 GMT). Our e-library is always open for members here: eLibrary , for full-text access to over 200 e-books and millions of articles. Thank you for your patience.
Low-head drilling [LHD] avoids differential sticking and reduces formation damage. M. Kass, J.-C. Senger and M. Sach. OGJ, 8 September 1997, 95(36), 71, 72, 74, 75.
Details are given of how differential sticking and formation damage were avoided in Germany's Uelsen gas field by LHD drilling fluids. Four storage wells were drilled and completed using this technique in the depleted Bunter sandstone reservoir. A gradient of 0.6 bar/10 m (0.265 psi/ft) was achieved using an aerated mud system. Mud systems, LHD management, drilling costs, operational experience, and completion criteria are discussed, as well as future applications.
Abstract details
Journal title: Oil and Gas Journal
Subjects: Physics, Reservoir Engineering, Energy efficiency, Banking, finance and investment, Management and commerce, Economics, business and commerce, Energy consumption, Storage, Oil and gas extraction, Oil and gas, Oil, Primary energy production, Gas fields
